An item with internal machine threads designed to fit the external machine threads of a tube fitting. It has flat faces, one of which has a counterbored recess to accommodate packing, packing or sealing ring(s), gasket(s), and the like. The item, when installed, provides a method of locking and sealing the connection. See also locknut, pipe; nut (1), tube coupling and nut (1), plain, hexagon.
NSN 6645-00-950-6122
NSN 6685-00-934-8676
NSN 5990-01-351-2379
NSN 5895-01-646-6286
NSN 6145-00-062-7897
NSN 2925-00-878-2196
NSN 6145-00-948-1456
NSN 6110-01-478-0359
NSN 6650-01-193-8983
NSN 5960-00-706-5439
NSN 5945-01-551-1250
NSN 5990-00-728-8248